FREQUENCY AND HOLD-TIME EFFECTS ON DURABILITY OF MELT-INFILTRATED SIC/SIC

摘要

With the growing interest in ceramic matrix composites for multiple applications, the response of the material to service conditions needs to be understood. A range of durability assessment was undertaken on Melt Infiltrated (MI) SiC/SiC Ceramic Matrix Composite. MI SiC/SiC was tested under 30 Hz fatigue, 1 Hz fatigue, dwell fatigue (2 hour hold cycle) and creep loading. The applied stresses ranged from the micro-cracking initiation point to well above the saturation stress of the material. Test temperatures included room, 815 C and 1204 C. The effects of fatigue loading frequency and dwell (hold) time on the durability of the composite are discussed.